Discussion
Which among the following is a false statement ?
Answer: B
The false statement is 'The tuned circuit oscillator is highly unstable'.
The passage ends by saying that a tuned circuit oscillator will have excellent frequency stability, because in a parallel resonant circuit with a high Q the change in phase at resonance is abrupt. So calling it highly unstable is the opposite of what the passage states.
The other three statements agree with the passage. An oscillator does not give a perfectly constant frequency, transistor parameters are described as inherently unstable, and stray circuit elements and couplings are listed among the things that disturb the frequency.
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